End caps for calender rolls and the like in paper making machinery

ABSTRACT

A closure cap for the normally open ends of hollow shafts of calender rolls used in paper-making machinery wherein one or more of the rolls is maintained at proper working temperature by partaking of the temperature of steam supplied to the interior of the hollow shaft of the roll. Closure caps made in accordance with this invention and attached to both ends of a calender roll housing meet certain State safety regulations which require that protruding ends of any rotating roll or shaft be covered by or enclosed within a stationary housing or the like to prevent a person from unintentional or accidental contact with the rotating roll or shaft. The caps also enhance the appearance of the machine and prevent uncontrolled escapement of steam condensate into hazardous slippery accumulation on the floor area surrounding the machine.

United States Patent [72] Inventor Alfred J. Coulombe 503 N. Morton St., Newberg, Oreg. 97132 [211 App]. No. 815,020 [22] Filed Apr. 10, 1969 [45] Patented Apr. 27, 1971 [54] END CAPS FOR CALENDER ROLLS AND THE LIKE IN PAPER MAKING MACHINERY 2 Claims, 6 Drawing Figs.

[52] U.S. Cl. 165/89, 34/108 [51] Int. Cl F28b 17/00 [50] Field of Search 165/89; 34/108, 124-126; 100/93 [5 6] References Cited UNITED STATES PATENTS 2,593,595 4/1952 Offen 165/89 2,599,346 6/1952 Offen l65/89X FOREIGN PATENTS 1,033,839 6/ 1966 Great Britain Primary Examiner-Martin P. Schwadron Assistant Examiner-Theophil W. Streule Attorney-James D. Givnan ABSTRACT: A closure cap for the normally open ends of hollow shafts of calender rolls used in paper-making machinery wherein one or more of the rolls is maintained at proper working temperature by partaking of the temperature of steam supplied to the interior of the hollow shaft of the roll..

PATENTED mm 1971 3,576, 209

' sum 1 [IF 2 ALFRED J. COULOM BE LINVENTOR.

END CAPS FOR CALENDER ROLLS AND THE LIKE IN PAPER MAKING MACHINERY The principal objects of the invention are:

To provide a stationary closure cap for the ends of hollow steam-heated rotating calender rolls, and the like, and which caps serve a dual purpose of trapping steam condensate for safe removal to a remote point of disposal, and to protect persons from coming into contact with either end of the steam-heated roll.

To provide a cap of the character described which is of simple, efficient, durable, inexpensive construction and which may be quickly and conveniently attached to or removed from a calender roll bearing housing.

The shafts of conventional calender rolls are provided with annular grooves near each of their ends to accommodate hoisting cables or slings for-selectively removing a roll from a calender machine. Accordingly, a further object of the invention is to provide a cap for the purposes above pointed out and secured to the ends of the roll bearing housing in such a manner as to not interfere with placement of the slings about the roll or their removal therefrom.

The foregoing and other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof and in which:

FIG. 1 is an end elevational view, for illustrative purposes only, to show the relationship of the calender rolls and the attachment of the cap of this invention to the ends of the rolls.

FIG. 2 is an end elevational view of a calender roll whose shaft is provided with a cap made in accordance with my invention and with fragments broken away for clearness of illustration.

FIG. 3 is a view similar to FIG. 2 showing a steam inlet to the interior of the roll shaft or a condensate outlet therefrom.

P10. 4 is a side elevational view of FIG. 3 and partially in section as viewed along the line 4-4 of FIG. 3.

FIG. 5 is a top plan view on an enlarged scale of one end of a calender roll showing the cap, in accordance with this invention, secured to the end of the roll bearing housing and enclosing the end of the roll shaft.

FIG. 6 is an end elevational view of FIG. 5.

Referring now more particularly to the drawings wherein like reference numerals designate like parts, the end elevational view in FIG. 1 is exemplary of a calender roll machine including the usual calender rolls indicated generally at l, 2, 3, and wherein, for example, the interior of the hollow shaft 4 of the roll (FIGS. 2 and 3) is supplied with steam through a conduit 5 (FIG. 3) from a source of steam generation, not shown.

Since both ends of each calender roll wherein one end is a steam inlet and the other end a condensate outlet, the bearing housings, indicated generally at 7, and the protruding ends of their respective hollow shafts 4 are identical, a description of one such assembly will suffice for all.

As best illustrated in FIG. 5, the outer end of shaft 4 terminates within a cap 8 and is provided near each of its ends with an exposed annular groove 9. The cap is mounted in concentric relation to the shaft 4 by brackets 10 and 11, one of which 10 may be bolted to the cap as at 12 and to the end of the roll bearing housing as at 13 while the opposite bracket 11 may be similarly secured as at 15 to the: end of the roll bearing housing and its outer end permanently secured to the cap by welding or the like as at 16. In either case the groove 9 in the shaft 4 is readily accessible for engagement with a sling or lifting cables 18 (FIG. 2) for removing the roll from the calender machine.

The steam from the conduit 5 is supplied to the interior of the shaft 4 through an opening 20 in the end wall thereof and through a supporting disc 21 disposed within the roll.

As shown in FIG. 4, the sidewall of the cap 8 is slotted as at 22 to fit closely over the conduit 5 and the inner end of bracket 10 terminates against or closely adjacent the conduit 5. The length of this bracket 10 is such that it closes substantially the full length of the slot 22 and thus prevents leakage of residual condensate. In open communication with the interior of the cap 8 and extending downwardly therefrom is a small tube 24 for drainage of any small amount of any residual condensate which might accumulate within the cap. If desired, the tube 24 could be provided with a drainage tube extending to a remote point of discharge.

The rotation of hollow roll shaft 4 (FIG. 3) is in the direction of the applied arrow, and to deflect any steam condensate from the peripheral surface of said roll to the bottom of the cap 8 I provide a deflector 26 spot welded to the inner wall of the cap and bent toward the roll approximately on the angle as shown.

Iclaim:

I. In a paper-making machine having a number of vertically aligned rotatable calender rolls mounted upon hollow shafts 30 journaled in end bearings and maintained at working temperature by partaking of steam temperature supplied to the interior of said hollow shafts, the improvement comprising;

at least one of said hollow shafts extending outwardly from its respective bearings,

two diametrically opposed stationary brackets secured to and extending outwardly from each of said bearings,

cylindrical caps closed at one end,

the outer peripheral wall of each of said caps permanently secured to one of said brackets and removably secured to the other of said brackets whereby the outwardly extending ends of said shaft are concealed within and shielded by their respective caps,

said caps being of a greater inside diameter than the outside diameter of said extended ends of their respective hollow shaft to thereby provide annular space for accumulation of steam condensate from said hollow shaft,

a vertically disposed drainage tube in open communication with the interior of each of said caps and with said annular space,

a deflector plate permanently secured to the inner peripheral wall of said caps and bent outwardly toward said hollow shaft,

whereby steam condensate separated by centrifugal force from the outer peripheral surface of said hollow shaft will be deflected toward the bottom of said caps.

2. The improvement as claimed in claim 1, wherein the exposed end portions of said shaft between their respective caps and bearings has a visible annular groove and thereby adapted for engagement with slings or lifting cables. 

1. In a paper-making machine having a number of vertically aligned rotatable calender rolls mounted upon hollow shafts journaled in end bearings and maintained at working temperature by partaking of steam temperature supplied to the interior of said hollow shafts, the improvement comprising; at least one of said hollow shafts extending outwardly from its respective bearings, two diametrically opposed stationary brackets secured to and extending outwardly from each of said bearings, cylindrical caps closed at one end, the outer peripheral wall of each of said caps permanently secured to one of said brackets and removably secured to the other of said brackets whereby the outwardly extending ends of said shaft are concealed within and shielded by their respective caps, said caps being of a greater inside diameter than the outside diameter of said extended ends of their respective hollow shaft to thereby provide annular space for accumulation of steam condensate from said hollow shaft, a vertically disposed drainage tube in open communication with the interior of each of said caps and with said annular space, a deflector plate permanently secured to the inner peripheral wall of said caps and bent outwardly toward said hollow shaft, whereby steam condensate separated by centrifugal force from the outer peripheral surface of said hollow shaft will be deflected toward the bottom of said caps.
 2. The improvement as claimed in claim 1, wherein the exposed end portions of said shaft between their respective caps and bearings has a visible annular groove and thereby adapted for engagement with slings or lifting cables. 